title: Lead in petrol: again.
mesh_terms: D000328:Adult; D002648:Child; D002652:Child Behavior / Q000187:drug effects; D004781:Environmental Exposure; D006801:Humans; D007854:Lead / Q000097:blood*; D007855:Lead Poisoning / Q000517:prevention & control; D010578:Petroleum / Q000032:analysis*
chemical_list: D010578:Petroleum; D007854:Lead